package com.syl.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class RedisConfig extends CachingConfigurerSupport {

  @Bean
  public RedisTemplate<Object, Object> redisTemplate(
      RedisConnectionFactory redisConnectionFactory) {
    RedisTemplate<Object, Object> template = new RedisTemplate<>();
    template.setConnectionFactory(redisConnectionFactory);
    Jackson2JsonRedisSerializer<Object> jacksonSeial =
        new Jackson2JsonRedisSerializer<>(Object.class);
    // 解决查询缓存转换异常的问题
    ObjectMapper om = new ObjectMapper();
    // 指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    // 指定序列化输入的类型，类必须是非final修饰的，final修饰的类，比如String,Integer等会跑出异常
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    jacksonSeial.setObjectMapper(om);
    // 设置RedisTemplate模板API的序列化方式为JSON
    template.setDefaultSerializer(jacksonSeial);
    return template;
  }

  @Bean
  public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
    // 分别创建String和JSON格式序列化对象，对缓存数据key和value进行转换
    RedisSerializer<String> strSerializer = new StringRedisSerializer();
    Jackson2JsonRedisSerializer<Object> jacksonSeial =
        new Jackson2JsonRedisSerializer<>(Object.class);
    // 解决查询缓存转换异常的问题
    ObjectMapper om = new ObjectMapper();
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    jacksonSeial.setObjectMapper(om);
    // 定制缓存数据序列化方式及时效
    RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
        .serializeKeysWith(
            RedisSerializationContext.SerializationPair.fromSerializer(strSerializer))
        .serializeValuesWith(
            RedisSerializationContext.SerializationPair.fromSerializer(jacksonSeial))
        .disableCachingNullValues();   // 对空数据不进行缓存
    return RedisCacheManager.builder(redisConnectionFactory)
        .cacheDefaults(config).build();
  }
}

